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Auxiliary Battery Malfunction ?

Old Jun 11, 2024 | 10:10 AM
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Auxiliary Battery Malfunction ?

2018 S560 4Matic. Auxiliary Battery Malfunction popped up on dash this yesterday then went away. What is the cause of the issue? IS this something I can perform and are there instructions somewhere?



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Old Jun 11, 2024 | 11:12 AM
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YouTube has several videos on how to change the aux battery and regular battery. View a couple and see if you want to do the job yourself.
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Old Jun 11, 2024 | 03:37 PM
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I have the same car. Changed it myself last time it went and was not easy. Burried in the trunk on the right side rear fender well. It’s a small motorcycle like looking battery. Next time I’ll try to get someone to do it.
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Old Jun 13, 2024 | 09:19 AM
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Do you have a diagram or schematic? I see a video for a 2017 but not a 2018. Are they the same?
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Old Jun 13, 2024 | 11:15 PM
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Not a difficult job, just tedious. Not a lot of space to work in. It's certainly a task that a basic DIYer can do.
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Old Jun 14, 2024 | 02:18 PM
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Dealer charges a ton but I took it for a last pre-paid service and thought maybe the extended warranty would cover. It was $500 from the crooks my indy woudl have done it for half. Lesson learned and I never go back to the dealers unless I am using the my extended warranty
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Old Jun 14, 2024 | 03:34 PM
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Originally Posted by badq45t
Dealer charges a ton but I took it for a last pre-paid service and thought maybe the extended warranty would cover. It was $500 from the crooks my indy woudl have done it for half. Lesson learned and I never go back to the dealers unless I am using the my extended warranty
Exactly, $500 for my dealership to replace back in 2019 on my '08 S550. Your extended warranty however does not apply to batteries, it is a wear/maintenance item.

Trenton O. Gibson
tgibson@highline-autos.com
Highline Autos
Direct: 602.909.9216
Office: 480.348.0777
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Old Jun 25, 2024 | 12:35 AM
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And replace it with YTX14-BS . You can buy it at amazon. It is exactly the same.
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Old Jun 25, 2024 | 12:36 PM
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Geezz those are less than $50 I hope that I was getting a better product from the stealership for my $500!!!
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